Expansion steam trap



Mat R. J. BURNS EXPANSION STEAM TRAP Filed July 18. 1925 i g 'nuanfor (Ear/70 9 law Patented Mar. 22, 1927. V i g i cart-re stares P arm's- 7 Application filed July 18, 1925. Serial No. 44,491. V

This invention relates to what may be the ends is a right angular nipple 7 with conveniently and broadly referred to as an which a discharge pipe 8 is connected. expansion steam trap of the type wherein Slidably mounted in the stu'liing box and- .a control valvevis closed to trap the steam extending into the interior of the casing until the latter condenses into a fluid sutfi is a valve rod 9. It will be noted that this: ciently cool, at which time the relatively rod extends beyond the stuffing box and that cool fluid is discharged. a the internal portion within the casing 3 is The invention has more specific reference such that the inner end of the rod serves to an expansion steam trap of this type as a valve for cooperation with the adjawherein the valve is automatically opened cent end of the aforesaid bore. and closed according to the expansion and Novel means is employed for imparting contraction of the pipe, the valve being sliding movement to the valve rod for movclosed when the pipe is filled with steam, ing it toward andfrom the seat 5. The and being automatically opened when the means preferably comprises a pair of collars steam condenses to a fluid and the fluid beor plates'lO and llfixedly connected with com s suffi iently c001. the pipe '1 at longitudinally spaced points. The particular details and their relative A cross head 12 is connected to the outer arrangement, forming an advantageous and threaded end of the valve rod 9, preferably practical structure, will become apparent by means of adjusting nuts 13.7 Connected from the following description and drawto the outer ends ofthis cross head by the i adjusting means shown at 14- is a pair of In the accompanying drawings forming rods 15. These rods extend slidably through a part of this application and in which like guide openings in the plate 10 and are ad-v numerals are employed to designate like justably connected as at 16 to the plates 11. I parts throughout the sa1ne-:- From the foregoing it is clear that when Figure l is a View in sect-ion and elevathe metal part 1 becomes heated to an undue tion showing a device constructed in accorddegree by excessive steam, it expands lengthance with the present invention, and illuswise, thus exerting a pull upon the rods trating the valve inparticular. 15. These rods in turn exert a pull upon Fig. 2 is a detail view of a coupling formthe valve rod 9 through the medium of the ing a part of the invention. cross head 12, thus moving the inner end Fig. 3 is an enlarged detail view of the of the valve rod toward the seat 5 and closvalve rod. ing the passage. So long as the pipe is Referring to the drawings in detail, the filled with steam of'a relatively high tern reference character 1 designates a pipe perature, the valve remains closed, but as 35 through which the steam is adapted to pass soon as the steam condenses into a cool in a direction from right to left, The pipe fluid, the latter acts to contract the pipe is screw threaded at its opposite ends and and to thereby open the valve so as to allow at its left-hand end is tapped into a counterthe condensed fluid to discharge from the bored screw threaded socket in a coupling trap. V t 2. The coupling in turn is externally screw Having thus described my invention, what threaded and is screwed into one end of a I claim as new is somewhat tapered casing 3. It will be noted Ina structure of the class described, a that the coupling is provided with a rerelatively long expansible and contractible striated bore forming a passage for the steam pipe, a casing at the discharge end .9 steam, the bore being represented by the refof said pipe, a coupling between the pipe erence character 4:. The reference character and easing, said coupling being provided 5 designates what may be said to be a valve with a restricted passage and a valve seat seat. At one end of the casing is; an apand being threaded on the pipe and in the propria-te stufing box 6 and intermediate casing, a'stufling box carried by the end of said casing remote from the coupling, a head connected to the outer end of said valve rod slidable through said stufling box, valve rod, a plate anchored on the intake the inner end of said valve rod being coend of said pipe, and connections between 10 operable with said seat of the coupling, said cross head and plate.

and means mounted upon said pipe and 0011- In testimony whereof I aflix my signature. nected with said Valve rod for actuating the latter, said means comprising a cross 7 RICHARD J. BURNS. 

